"The application 'run' does not exist" after updating to 6.0.8 on Ubuntu 22.04

Describe the bug

Running dotnet run (or new or --version) outputs:

The command could not be loaded, possibly because:
  * You intended to execute a .NET application:
      The application 'run' does not exist.
  * You intended to execute a .NET SDK command:
      No .NET SDKs were found.

Download a .NET SDK:
https://aka.ms/dotnet-download

Learn about SDK resolution:
https://aka.ms/dotnet/sdk-not-found

To Reproduce

Yesterday at the end of the day it was all fine. This morning, I opened my laptop run apt update and apt upgrade. Version 6.0.8 was installed (and VS Code 1.70.1) and after that I could not run SDK commands anymore.

dotnet --list-sdks returns nothing. dotnet --info mentions global.json file: Not found

Error

The command could not be loaded, possibly because:
  * You intended to execute a .NET application:
      The application 'run' does not exist.
  * You intended to execute a .NET SDK command:
      No .NET SDKs were found.

Download a .NET SDK:
https://aka.ms/dotnet-download

Learn about SDK resolution:
https://aka.ms/dotnet/sdk-not-found

Further technical details

• Include the output of dotnet --info

global.json file:
  Not found

Host:
  Version:      6.0.8
  Architecture: x64
  Commit:       55fb7ef977

.NET SDKs installed:
  No SDKs were found.

.NET runtimes installed:
  Microsoft.AspNetCore.App 6.0.8 [/usr/lib/dotnet/dotnet6-6.0.108/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 6.0.8 [/usr/lib/dotnet/dotnet6-6.0.108/shared/Microsoft.NETCore.App]

Download .NET:
  https://aka.ms/dotnet-download

Learn about .NET Runtimes and SDKs:
  https://aka.ms/dotnet/runtimes-sdk-info

• VS Code 1.70.1 but I mostly use the CLI to interact with .NET

[baronfel]

Please see if https://github.com/dotnet/core/issues/7699 describes your situation and how to resolve it.

[stoyandimov]

The instructions in https://github.com/dotnet/core/issues/7699 solved it for me as well.